WO2020188935A1 - Construction machine boom mount device - Google Patents

Construction machine boom mount device Download PDF

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Publication number
WO2020188935A1
WO2020188935A1 PCT/JP2019/050520 JP2019050520W WO2020188935A1 WO 2020188935 A1 WO2020188935 A1 WO 2020188935A1 JP 2019050520 W JP2019050520 W JP 2019050520W WO 2020188935 A1 WO2020188935 A1 WO 2020188935A1
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WO
WIPO (PCT)
Prior art keywords
pair
boom
guide
adapter
upper frame
Prior art date
Application number
PCT/JP2019/050520
Other languages
French (fr)
Japanese (ja)
Inventor
一朗 和田
幸雄 宮野
Original Assignee
コベルコ建機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by コベルコ建機株式会社 filed Critical コベルコ建機株式会社
Priority to US17/428,363 priority Critical patent/US20220112680A1/en
Priority to AU2019435117A priority patent/AU2019435117A1/en
Priority to CA3126541A priority patent/CA3126541A1/en
Priority to EP19919719.5A priority patent/EP3896229B1/en
Publication of WO2020188935A1 publication Critical patent/WO2020188935A1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E02F3/382—Connections to the frame; Supports for booms or arms
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/006—Pivot joint assemblies
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0808—Improving mounting or assembling, e.g. frame elements, disposition of all the components on the superstructures

Definitions

  • the present invention relates to a boom mounting device for mounting a boom on the upper frame of a construction machine.
  • Patent Document 1 discloses a technique for accurately positioning an intermediate coupling in a configuration in which an intermediate coupling (adapter) is interposed between a vertical plate of a vehicle body frame and a working device.
  • the swivel frame of the upper swivel body has left and right vertical plates
  • the working device including the boom has the left and right vertical plates of the swivel frame via the intermediate coupling.
  • the intermediate coupling is lowered from above toward the left and right vertical plates
  • the downward protrusions of the left and right coupling side guides provided on the intermediate coupling are guided by the weight of the intermediate coupling on the left and right vertical plates.
  • the forward protrusions of the left and right coupling side guides are automatically engaged with the front engaging grooves of the left and right vertical plate side guides.
  • An object of the present invention is to provide a boom mounting device for a construction machine capable of easily aligning the boom with respect to the upper frame of the construction machine.
  • the present invention is to attach the boom to the upper frame in a construction machine including an upper frame, a boom undulatingly supported by the upper frame, and a boom cylinder that expands and contracts to undulate the boom.
  • Boom mounting device is provided on the upper frame, and has a center section including a bottom plate and a pair of left and right vertical plates erected on the bottom plate, and the boom and the boom cylinder can be rotated to the center section, respectively.
  • the adapter includes an adapter body that rotatably supports the base end portion of the boom and the base end portion of the boom cylinder around a rotation center axis extending in the left-right direction, and the adapter.
  • each of the upper surface portion of the guide portion has a guide portion having a guide hole that can receive the guide pin along the downward direction when the boom is mounted on the upper frame.
  • FIG. 8 is a side view of FIG. 8 along the arrow IX. It is a side view which looked at FIG. 8 along the arrow X.
  • FIG. 1 is a perspective view showing a part of the hydraulic excavator 1 according to the present embodiment.
  • the hydraulic excavator 1 includes a lower traveling body (not shown), an upper rotating body 3 that is rotatably mounted on the lower traveling body, and a boom 5 (work attachment) mounted on the upper rotating body 3. It is equipped with one component).
  • FIG. 2 is a perspective view showing an upper frame 31 of the upper swing body 3 of the hydraulic excavator 1 according to the present embodiment.
  • FIG. 3 is a side view of the upper frame 31 of the hydraulic excavator 1 according to the present embodiment as viewed from the left side of the machine.
  • FIG. 4 is a side view of the upper frame 31 of the hydraulic excavator 1 according to the present embodiment as viewed from the right side of the machine.
  • the upper swing body 3 includes an upper frame 31 on which various facilities and devices such as a cabin (driver's cab) can be mounted.
  • the upper frame 31 includes a center section 4 located at the center in the vehicle width direction (left-right direction).
  • the boom 5 is undulatingly supported by the upper frame 31.
  • the center section 4 includes a bottom plate 41, a pair of left and right vertical plates 43L, 43R standing on the bottom plate 41, a pair of left and right inner vertical plates 43LS, 43RS (FIG. 2) arranged inside the bottom plate 41, and a vertical plate 43L, It is configured to include back plates 45L and 45R provided at the upper end edge of 43R, respectively.
  • the front ends of the pair of left and right vertical plates 43L and 43R and the front ends of the pair of left and right inner vertical plates 43LS and 43RS are formed with connecting pin holes 43LQ and 43RQ opened along the left and right directions, respectively.
  • connecting pin holes 43LP and 43RP are formed on the tops of the pair of left and right vertical plates 43L and 43R, respectively. In these connecting pin holes, adapter connecting pins (not shown) for connecting and fixing the adapter 7 described later are inserted into the center section 4 of the upper frame 31, respectively.
  • the center section 4 is arranged on the surface (outer surface) of the left vertical plate 43L facing the outside (left side), and has a guide portion 431L including an upper surface portion.
  • a guide hole 430L having a vertical direction as an insertion direction is formed in the upper surface portion of the guide portion 431L.
  • the guide hole 430L has a size through which a guide pin 75L (see FIG. 5), which will be described later, can be inserted.
  • the center section 4 is arranged on the upper surface of the back plate 45L on the left side, and has a bracket 450L (positioning portion) including a recess opened upward.
  • the recess of the bracket 450L has an R shape that allows surface contact with a part of the body of the positioning pin 79 (see FIG. 8) described later. Therefore, the bracket 450L includes a pair of front and rear inner wall surfaces arranged to face each other in the front-rear direction so as to define the recess, and a lower surface portion connecting the pair of inner wall surfaces. The R shape is applied to the lower surface portion.
  • the center section 4 is arranged on a surface (outer surface) facing the outside (right side) of the vertical plate 43R on the right side, and has a guide portion 431R including an upper surface portion.
  • a guide hole 430R having a vertical direction as an insertion direction is formed in the upper surface portion of the guide portion 431R.
  • the guide hole 430R has a size through which a guide pin 75R (see FIG. 7) described later can be inserted.
  • the center section 4 is arranged on the upper surface of the back plate 45R on the right side, and has a bracket 450R (positioning portion) including a recess opened upward.
  • the recess of the bracket 450R has an R shape that allows surface contact with a part of the body of the positioning pin 79 (see FIG. 8) described later. Therefore, the bracket 450R includes a pair of front and rear inner wall surfaces arranged to face each other in the front-rear direction so as to define the recess, and a lower surface portion connecting the pair of inner wall surfaces. The R shape is applied to the lower surface portion.
  • FIG. 5 is a side view showing a state in which the boom 5 and the adapter 7 of the hydraulic excavator 1 according to the present embodiment are disassembled.
  • the hydraulic excavator 1 further includes a boom cylinder 51 that is mounted on the boom 5 and can be expanded and contracted to raise and lower the boom 5.
  • an adapter 7 (also referred to as a subframe or the like) for disassembling and assembling the boom 5 and the boom cylinder 51 in an integrated state is attached to the base end side of the boom 5.
  • the adapter 7 rotatably connects the boom 5 and the boom cylinder 51 to the center section 4.
  • the adapter 7 has an insertion hole 71 for a connecting pin (not shown) that rotatably connects the base end of the boom 5, and a connecting pin (not shown) that rotatably connects the base end of the boom cylinder 51.
  • the insertion hole 73 is formed.
  • the center section 4 and the adapter 7 constitute the boom mounting device 100 of the present invention.
  • the boom mounting device 100 has a structure for mounting the boom 5 to the upper frame 31 in the hydraulic excavator 1.
  • FIG. 6 is a side view of the boom 5 in a state where the adapter 7 of the hydraulic excavator 1 according to the present embodiment is attached, as viewed from the left side of the machine.
  • the base end portion of the boom 5 and the base end portion of the boom cylinder 51 are rotatably attached around the rotation center axis extending in the left-right direction with respect to the adapter 7, and the adapter 7 and the boom 5 are attached.
  • the boom cylinder 51 is held integrally and can be rotatably connected to the center section 4.
  • the adapter 7 has an adapter main body 700 and a pair of left and right guide pins 75L and 75R extending downward from the adapter main body 700, respectively.
  • the adapter body 700 rotatably supports the base end of the boom 5 and the base end of the boom cylinder 51 around a rotation center axis extending in the left-right direction.
  • the adapter main body 700 has a shape that rises toward the rear, and has a left side plate and a right side plate (a pair of left and right side plates) that are arranged at intervals in the left-right direction. These left and right side plates have an upper plate 701 and a lower plate 702, respectively.
  • the upper plate 701 rotatably supports the insertion hole 71 for rotatably supporting the base end portion 5A (FIG.
  • the lower plate 702 is formed with connecting pin holes 7A and 7B for connecting the adapter 7 to the center section 4, respectively.
  • the above-mentioned adapter connecting pins for connecting and fixing the adapter 7 to the center section 4 of the upper frame 31 are inserted into these connecting pin holes.
  • a guide pin 75L elongated in the vertical direction is downward on the surface (outer surface) of the left side plate (lower side plate 702) of the adapter body 700 of the adapter 7 facing the outside (left side). It is provided so as to extend toward it.
  • the guide pin 75L has a thickness that allows it to be inserted into and removed from the guide hole 430L (FIGS. 2 and 3) described above.
  • FIG. 7 is a side view of the boom 5 in a state where the adapter 7 of the hydraulic excavator 1 according to the present embodiment is attached, as viewed from the right side of the machine.
  • a guide pin 75R elongated in the vertical direction is downward on the surface (outer surface) of the right side plate (lower side plate 702) of the adapter body 700 of the adapter 7 facing the outside (right side). It is provided so as to extend toward it.
  • the guide pin 75R has a thickness that allows it to be inserted and removed from the guide hole 430R (FIG. 4) described above.
  • FIG. 8 is a plan view showing how the adapter 7 of the hydraulic excavator 1 according to the present embodiment is attached to the upper frame 31.
  • the adapter body 700 of the adapter 7 has a pair of left and right rear overhanging portions 77L, 77R and a positioning pin 79, whose rear end side partially projects to the rear of the machine. ing.
  • Pin holes 78L and 78R positioning pin holes
  • the positioning pin 79 shown in FIG. 8 is inserted into and fixed to the pin holes 78L and 78R.
  • the pair of left and right rear overhangs 77L and 77R each have an outer surface (outer surface of the overhang) facing outward in the left-right direction.
  • the positioning pin 79 has a dimension larger than the distance between the pair of left and right rear overhangs 77L, 77R in the left-right direction, and the left and right ends thereof are pin holes 78L, 78R (a pair of left and right). It is attached (fixed) to a pair of left and right rear overhangs 77L, 77R while being inserted into pin holes 78L, 78R so as to project from the rear overhangs 77L, 77R to the left and right, respectively. There is).
  • the boom 5 When mounting the boom 5 (adapter 7) on the upper frame 31, first, the boom 5 is gradually lowered using a crane or the like (not shown) so that the left and right guide pins 75L and 75R are inserted into the left and right guide holes 430L and 430R. To go.
  • FIG. 9 is a side view of FIG. 8 as viewed along the arrow IX.
  • FIG. 10 is a side view of FIG. 8 as viewed along the arrow X.
  • the left and right guide holes 430L and 430R are arranged at substantially the same height, but the left guide pin 75L is configured to be longer than the right guide pin 75R (so that it protrudes downward). Has been done. Therefore, when the boom 5 is gradually lowered, as shown in FIGS. 9 and 10, the left guide pin 75L is first inserted into the left guide hole 430L, and when the boom 5 is further lowered, the boom 5 is further lowered. The guide pin 75R on the opposite side (right side) is inserted into the guide hole 430R on the right side.
  • the approximate position of the boom 5 is determined. More specifically, the relative positions of the connecting pin holes 43LQ and 43RQ formed in the center section 4 of the upper frame 31 and the pair of left and right connecting pin holes 7A formed in the adapter 7 in the front-rear direction and the left-right direction match. , With respect to the center section 4 so that the relative positions of the connecting pin holes 43LP and 43RP formed in the center section 4 and the pair of left and right connecting pin holes 7B formed in the adapter 7 in the front-rear direction and the left-right direction match. The relative position of the adapter 7 is determined (constrained).
  • the positioning pin 79 (see FIG. 8) described above is finally fitted into the recesses of the left and right brackets 450L and 450R.
  • the portions both ends, engaging pins
  • the pair of left and right brackets 450L and 450R (positioning portions) receive both ends of the positioning pins 79 of the adapter 7 into the recesses from above, thereby preventing the adapter 7 from moving at least downward.
  • the final position of the boom 5 is determined.
  • the relative positions of the connecting pin holes 43LQ and 43RQ formed in the center section 4 of the upper frame 31 and the pair of left and right connecting pin holes 7A formed in the adapter 7 in the front-rear direction, the left-right direction, and the up-down direction. are matched, and the relative positions of the connecting pin holes 43LP and 43RP formed in the center section 4 and the pair of left and right connecting pin holes 7B formed in the adapter 7 are matched in the front-rear direction, the left-right direction, and the up-down direction.
  • the relative position of the adapter 7 with respect to the center section 4 is determined (constrained).
  • adapter connecting pins (not shown) are inserted into the connecting pin holes 43LQ and 43RQ and the pair of left and right connecting pin holes 7A, respectively, and the connecting pin holes 43LP and 43RP and the pair of left and right connecting pin holes 7B are not inserted.
  • the adapter 7 is fixed to the upper frame 31.
  • the boom 5 is rotatably supported by the upper frame 31.
  • the boom 5 When removing the boom 5 from the upper frame 31, the boom 5 is gradually lifted using a crane or the like (not shown). When the boom 5 is gradually lifted, there is a time point when the adapter 7 attached to the boom 5 is separated from the upper frame 31.
  • the time when the adapter 7 separates from the upper frame 31 is when the left and right side plates of the adapter body 700 of the adapter 7 and the left and right vertical plates 43L and 43R constituting the center section 4 overlap in the machine width direction (left and right direction). It means the time when it disappears.
  • FIG. 11 is a side view of the state when the adapter 7 of the hydraulic excavator 1 according to the present embodiment is separated from the upper frame 31 as viewed from the left side of the machine.
  • FIG. 12 is a side view of the state in which the adapter 7 of the hydraulic excavator 1 according to the present embodiment is attached to the upper frame 31 as viewed from the left side of the machine.
  • the left guide pin 75L is maintained in a state of being inserted into the left guide hole 430L.
  • the guide pin 75R on the opposite side (right side) is also maintained in a state of being inserted into the guide hole 430R on the right side.
  • the left and right guide pins 75L and 75R are configured to have a length that maintains the state of being inserted into the left and right guide holes 430L and 430R.
  • the adapter 7 is detached from the upper frame 31, when the lower end portion of the adapter body 700 is aligned with the upper end portions of the pair of left and right vertical plates 43L and 43R of the center section 4 when viewed from the left and right direction, the left and right portions are described.
  • a pair of left and right guide pins so that at least one of the pair of guide pins 75L and 75R is inserted into at least one of the guide holes 430L and 430R of the pair of left and right vertical plates 43L and 43R.
  • the lengths of the guide pins 75L and 75R may be set.
  • the guide portion 431L on the left side is arranged at a position visible from the outside (left side) of the machine of the hydraulic excavator 1 in a side view (when viewed from the left side).
  • the left guide portion 431L is arranged in the front-rear direction between the tilt deck 81 in which a cabin (not shown) is installed and the hydraulic oil tank 83.
  • the inserted state of the guide pin 75L can be sufficiently confirmed, but from the operator's point of view, the guide hole 430L formed in the guide portion 431L is further increased. If it is visible, the insertion work of the guide pin 75L can be performed more easily and reliably. The same applies to the guide portion 431R on the right side.
  • the structure 85 on the upper frame 31 is arranged on the opposite side of the guide portion 431L in the left-right direction. Therefore, the guide portion 431R is arranged in front of the structure 85, and the guide portion 431R can be visually recognized from the right side of the hydraulic excavator 1 in the same manner as described above.
  • the guide portion 431L is arranged behind the connecting pin hole 43LP (FIG. 3), and the guide portion 431R is arranged in front of the connecting pin hole 43RP (FIG. 4).
  • the connecting pin holes 43LP and 43RP are arranged on the same axis.
  • the guide hole 430L (see FIGS. 2 and 3) is formed in the guide portion 431L arranged on the surface facing the outside (left side) of the vertical plate 43L, and the outside (right side) of the vertical plate 43R.
  • a guide hole 430R (see FIG. 4) is formed in the guide portion 431R arranged on the surface facing the).
  • a guide pin 75L (see FIG. 5) is provided so as to extend downward on the surface of the left side plate of the adapter body 700 of the adapter 7 facing the outside (left side), and the outside of the right side plate of the adapter body 700 of the adapter 7 is provided.
  • a guide pin 75R (see FIG. 7) is provided so as to extend downward on the surface facing (right side).
  • the insertion status of the left and right guide pins 75L and 75R and the left and right guide holes 430L and 430R can be visually recognized from the side of the machine. Therefore, when the boom 5 (adapter 7) is attached to the center section 4, both can be easily aligned.
  • the left and right guide pins 75L and 75R may protrude from the lower surface of the adapter body 700 of the adapter 7.
  • the approximate positions (positions in the front-rear direction and the left-right direction) of the boom 5 are determined. Then, when the portions (engagement pins) protruding from the pin holes 78L and 78R to the left and right outside of the body of the positioning pin 79 are fitted into the recesses of the brackets 450L and 450R from above, the final position of the boom 5 ( Positions in the front-back direction, left-right direction, and up-down direction) are determined. That is, in the present embodiment, the boom 5 is positioned in order in two stages. Therefore, it is possible to align the boom 5 more easily than the one in which the boom is positioned in one step.
  • the left and right guide holes 430L and 430R are arranged at substantially the same height, while the left guide pin 75L is configured to be longer than the right guide pin 75R and extends further downward. There is. Therefore, when the boom 5 is gradually lowered, the guide pin 75L is first inserted into the guide hole 430L as shown in FIGS. 9 and 10, and when the boom 5 is further lowered, the guide on the opposite side is inserted.
  • the relative positions of the pair of left and right guide pins 75R and 75L and the pair of left and right guide holes 430R and 430L are set so that the pin 75R is inserted into the guide hole 430R. Therefore, the insertion work is easier and the workability is higher than that in which the guide pins 75L and 75R are inserted into the guide holes 430L and 430R at the same time.
  • the left and right guide pins 75L and 75R are maintained in a state of being inserted into the left and right guide holes 430L and 430R, respectively. .. That is, with the left and right guide pins 75L and 75R inserted into the left and right guide holes 430L and 430R, the adapter body 700 of the adapter 7 is a pair of left and right vertical plates 43L and 43R of the center section 4 when viewed from the left and right.
  • the lengths of the pair of left and right guide pins 75L and 75R are set so as to be separated upward from the above.
  • the guide portion 431L on the left side is arranged between the tilt deck 81 in which the cabin (not shown) is installed and the hydraulic oil tank 83 in the front-rear direction. Therefore, the operator can reliably visually recognize the insertion status of the left guide portion 431L into the guide hole 430L with respect to at least the left guide pin 75L from the side of the machine.
  • the boom mounting device for construction machinery according to the present invention is not limited to the above-described embodiment, and various modifications and improvements are possible as illustrated below.
  • left and right brackets 450L and 450R are provided on the left and right back plates 45L and 45R, but the present invention is not limited to this, and the left and right brackets 450L and 450R are left and right vertical plates 43L and 43R. It may be provided directly on the upper end edge of the.
  • the left and right guide holes 430L and 430R are arranged at substantially the same height, and the left guide pin 75L is longer than the right guide pin 75R and is configured to protrude further downward.
  • the present invention is not limited thereto.
  • the left and right guide pins 75L and 75R may be configured to have substantially the same length, and the left guide hole 430L may be arranged at a position higher than the right guide hole 430R.
  • the guide pin 75L can be inserted into the guide hole 430L first, and then the guide pin 75R on the opposite side can be inserted into the guide hole 430R.
  • the case where the left and right guide pins 75L and 75R are maintained in the left and right guide holes 430L and 430R, respectively, is maintained when the adapter 7 is separated from the upper frame 31.
  • the present invention is not limited to this.
  • one of the left and right guide pins 75L and 75R may be maintained in a state of being inserted into one of the left and right guide holes 430L and 430R. That is, when the adapter 7 is separated from the upper frame 31, one of the left and right guide pins 75L and 75R is configured to have a length that maintains the state of being inserted into one of the left and right guide holes 430L and 430R. You may.
  • the boom mounting device for construction machinery is suitable for mounting the boom on the upper frame in a hydraulic excavator or the like.
  • the present invention is to attach the boom to the upper frame in a construction machine including an upper frame, a boom undulatingly supported by the upper frame, and a boom undulating cylinder that expands and contracts to undulate the boom.
  • It is a boom mounting device for.
  • the boom mounting device is provided on the upper frame, and has a center section including a bottom plate and a pair of left and right vertical plates erected on the bottom plate, and the boom and the boom cylinder can be rotated to the center section, respectively.
  • the adapter includes an adapter body that rotatably supports the base end portion of the boom and the base end portion of the boom cylinder around a rotation center axis extending in the left-right direction, and the adapter.
  • each of the upper surface portion of the guide portion has a guide portion having a guide hole that can receive the guide pin along the downward direction when the boom is mounted on the upper frame.
  • the guide portions are arranged on the outward facing surfaces of the pair of left and right vertical plates constituting the center section, and the adapter is provided with the pair of left and right guide pins, so that the adapter can be centered.
  • the operator can visually check the insertion status between the left and right guide pins and the guide holes of the left and right guide portions from the side of the machine.
  • the adapter supporting the boom can be positioned in the front-rear direction and the left-right direction with respect to the center section. Therefore, when the boom is attached to the upper frame of the construction machine, both can be easily aligned in the horizontal direction.
  • the adapter body of the adapter is a pair of left and right rear overhangs protruding rearward of the machine, and each pair of left and right rear overhangs having outer surfaces of the overhangs facing outward in the left-right direction. And a pair of left and right engaging pins extending outward in the left-right direction from the outer surface of the overhanging portion of the pair of left and right rear overhanging portions, and the center section is a recess opened upward.
  • a pair of left and right positioning portions including a pair of front and rear inner wall surfaces arranged so as to demarcate the front and rear surfaces and a lower surface portion connecting the pair of inner wall surfaces, and the boom is the upper. Having a pair of left and right positioning portions that prevent the adapter from moving at least downward by receiving the pair of left and right engaging pins of the adapter body into the recess from above when mounted on the frame. Is desirable.
  • the adapter supporting the boom can be positioned downward with respect to the center section.
  • the left and right engaging pins project outward from the outer surface of the left and right rear overhanging portions, the engaging pins are easily visible to the operator. Therefore, when the boom is attached to the upper frame of the construction machine, both can be easily aligned in the vertical direction.
  • the pair of left and right rear overhangs are each opened with positioning pin holes that penetrate the rear overhang along the left-right direction, and the adapter body is formed by the pair of left and right rear overhangs.
  • the positioning pin has the left and right so that both ends thereof protrude outward from the pair of left and right rear overhangs in the left-right direction. It is desirable that the positioning pins are fixed to the pair of left and right rear overhangs in a state of being inserted into the pair of positioning pin holes, and that both ends of the positioning pin form the pair of left and right engaging pins.
  • a pair of engaging pins can be formed by both ends of one positioning pin, the relative positions of the pair of engaging pins can be stably maintained.
  • the positioning pin connects the left and right rear overhangs to each other, and the rigidity of the adapter body can be increased.
  • one of the left and right guide pins is inserted into the guide holes of the left and right vertical plates prior to the other guide pin. It is desirable that the relative positions of the pair of left and right guide pins and the guide portion of the pair of left and right vertical plates are set so as to be inserted into one of the guide holes.
  • the insertion work becomes easier and the workability can be improved as compared with the case where the pair of left and right guide pins are inserted into the pair of left and right guide holes at the same time.
  • the said The length of the pair of left and right guide pins is such that at least one of the pair of left and right guide pins is inserted into at least one of the guide holes of the pair of left and right vertical plates. It is desirable that each is set.
  • At least one of the pair of left and right guide portions is arranged at a position that can be visually recognized from the outside of the construction machine in a side view.
  • the operator can surely visually recognize from the side of the machine how at least one of the guide pins is inserted into the guide hole of the guide portion.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Shovels (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

Provided is a construction machine boom mount device that can easily position both an upper frame and a boom of a construction machine when mounting the boom to the upper frame. An upper frame (31) has a center section (4) that includes a pair of right and left vertical plates (43L, 43R). The vertical plates (43L, 43R) have exterior faces that face to the outside, and guide units (431L, 431R) that are disposed on the exterior face and have guide holes formed therein. An adapter (7) that links the basal end of a boom and the basal end of a boom cylinder so that each can rotate is mounted to the basal end side of the boom. The adapter has a pair of right and left guide pins (75L, 75R). When the boom is mounted to the upper frame, the pair of right and left guide pins are inserted in the guide holes of the pair of right and left guide units.

Description

建設機械のブーム取付装置Boom mounting device for construction machinery
　本発明は、建設機械のアッパーフレームにブームを取り付けるためのブーム取付装置に関する。 The present invention relates to a boom mounting device for mounting a boom on the upper frame of a construction machine.
　従来、建設機械の上部旋回体に作業装置（ブーム等）を取り付けるための技術が知られている。例えば、特許文献１では、車体フレームの縦板と作業装置との間に中間結合体（アダプタ）を介在させる構成において、中間結合体を正確に位置決めするための技術が開示されている。 Conventionally, a technique for attaching a work device (boom, etc.) to an upper swing body of a construction machine is known. For example, Patent Document 1 discloses a technique for accurately positioning an intermediate coupling in a configuration in which an intermediate coupling (adapter) is interposed between a vertical plate of a vehicle body frame and a working device.
　具体的には、特許文献１に記載された技術では、上部旋回体の旋回フレームが左右の縦板を有し、ブームを含む作業装置は、中間結合体を介して旋回フレームの左右の縦板に取付けられる。中間結合体が上方から左右の縦板に向けて下ろされるときに、中間結合体に設けられた左右の結合体側ガイドの下向き突起部が、中間結合体の自重により、左右の縦板側のガイドの縦案内溝に沿って下方に移動した後、斜め下前方に移動する。これにより、左右の結合体側ガイドの前向き突起部が、左右の縦板側ガイドの前係合溝に自動的に係合する。 Specifically, in the technique described in Patent Document 1, the swivel frame of the upper swivel body has left and right vertical plates, and the working device including the boom has the left and right vertical plates of the swivel frame via the intermediate coupling. Can be attached to. When the intermediate coupling is lowered from above toward the left and right vertical plates, the downward protrusions of the left and right coupling side guides provided on the intermediate coupling are guided by the weight of the intermediate coupling on the left and right vertical plates. After moving downward along the vertical guide groove of, move diagonally downward and forward. As a result, the forward protrusions of the left and right coupling side guides are automatically engaged with the front engaging grooves of the left and right vertical plate side guides.
特許第４７１３５１６号明細書Japanese Patent No. 4713516
　しかし、特許文献１に開示された技術では、左右の縦板側ガイドが左右の縦板の内側に形成されているため、これらの相対的な位置関係を作業者が建設機械の側方から視認することが難しく、中間結合体と左右の縦板との位置合わせ作業が難しいという問題があった。 However, in the technique disclosed in Patent Document 1, since the left and right vertical plate side guides are formed inside the left and right vertical plates, the operator can visually recognize these relative positional relationships from the side of the construction machine. There is a problem that it is difficult to perform the alignment work between the intermediate joint and the left and right vertical plates.
　本発明の目的は、建設機械のアッパーフレームに対してブームを取り付ける際に両者を容易に位置合わせすることが可能な建設機械のブーム取付装置を提供することにある。 An object of the present invention is to provide a boom mounting device for a construction machine capable of easily aligning the boom with respect to the upper frame of the construction machine.
　本発明によって提供されるのは、アッパーフレームと前記アッパーフレームに起伏可能に支持されるブームと前記ブームを起伏させるように伸縮するブームシリンダとを含む建設機械において前記ブームを前記アッパーフレームに取り付けるためのブーム取付装置である。当該ブーム取付装置は、前記アッパーフレームに備えられ、底板と前記底板に立設される左右一対の縦板とを含むセンターセクションと、前記ブームと前記ブームシリンダとをそれぞれ前記センターセクションに回動可能に連結するアダプタと、を備え、前記アダプタは、前記ブームの基端部および前記ブームシリンダの基端部をそれぞれ左右方向に延びる回転中心軸周りに回動可能に支持するアダプタ本体と、前記アダプタ本体から下方に向かってそれぞれ延びる左右一対のガイドピンと、を有し、前記左右一対の縦板は、左右方向の外側を向く外側面と、前記外側面に配置され上面部を含むガイド部であって、当該ガイド部の前記上面部には前記ブームが前記アッパーフレームに装着される際に下方向に沿って前記ガイドピンを受け入れることが可能なガイド穴が開口されているガイド部と、をそれぞれ有する。 Provided by the present invention is to attach the boom to the upper frame in a construction machine including an upper frame, a boom undulatingly supported by the upper frame, and a boom cylinder that expands and contracts to undulate the boom. Boom mounting device. The boom mounting device is provided on the upper frame, and has a center section including a bottom plate and a pair of left and right vertical plates erected on the bottom plate, and the boom and the boom cylinder can be rotated to the center section, respectively. The adapter includes an adapter body that rotatably supports the base end portion of the boom and the base end portion of the boom cylinder around a rotation center axis extending in the left-right direction, and the adapter. It has a pair of left and right guide pins extending downward from the main body, and the pair of left and right vertical plates are an outer surface facing outward in the left-right direction and a guide portion arranged on the outer surface and including an upper surface portion. Each of the upper surface portion of the guide portion has a guide portion having a guide hole that can receive the guide pin along the downward direction when the boom is mounted on the upper frame. Have.
本発明の一実施形態に係る建設機械の一部を示す斜視図である。It is a perspective view which shows a part of the construction machine which concerns on one Embodiment of this invention. 本発明の一実施形態に係る建設機械の上部旋回体のアッパーフレームを示す斜視図である。It is a perspective view which shows the upper frame of the upper swing body of the construction machine which concerns on one Embodiment of this invention. 本発明の一実施形態に係る建設機械のアッパーフレームを機械左側から見た側面図である。It is a side view which looked at the upper frame of the construction machine which concerns on one Embodiment of this invention from the left side of the machine. 本発明の一実施形態に係る建設機械のアッパーフレームを機械右側から見た側面図である。It is a side view which looked at the upper frame of the construction machine which concerns on one Embodiment of this invention from the right side of the machine. 本発明の一実施形態に係る建設機械のブーム及びアダプタが分解された状態を示す側面図である。It is a side view which shows the state which the boom and the adapter of the construction machine which concerns on one Embodiment of this invention are disassembled. 本発明の一実施形態に係る建設機械のブームにアダプタが装着された状態を機械左側から見た側面図である。It is a side view which looked at the state which the adapter was attached to the boom of the construction machine which concerns on one Embodiment of this invention from the left side of the machine. 本発明の一実施形態に係る建設機械のブームにアダプタが装着された状態を機械右側から見た側面図である。It is a side view which looked at the state which the adapter was attached to the boom of the construction machine which concerns on one Embodiment of this invention from the right side of the machine. 本発明の一実施形態に係る建設機械のアダプタがアッパーフレームに取り付けられる様子を示す平面図である。It is a top view which shows how the adapter of the construction machine which concerns on one Embodiment of this invention is attached to the upper frame. 図８を矢印ＩＸに沿って見た側面図である。FIG. 8 is a side view of FIG. 8 along the arrow IX. 図８を矢印Ｘに沿って見た側面図である。It is a side view which looked at FIG. 8 along the arrow X. 本発明の一実施形態に係る建設機械のアダプタがアッパーフレームから離れた時点の状態を機械左側から見た側面図である。It is a side view which looked at the state at the time when the adapter of the construction machine which concerns on one Embodiment of this invention is separated from the upper frame from the left side of a machine. 本発明の一実施形態に係る建設機械のアダプタがアッパーフレームに取り付けられた状態を機械左側から見た側面図である。It is a side view which looked at the state which the adapter of the construction machine which concerns on one Embodiment of this invention was attached to the upper frame from the left side of the machine.
　本発明の一実施形態に係る建設機械のブーム取付装置１００について図１から図１２に基づき説明する。以下、本発明に係る建設機械として、図１に示される油圧ショベル１を例示する。図１は、本実施形態に係る油圧ショベル１の一部を示す斜視図である。 The boom mounting device 100 for a construction machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 12. Hereinafter, the hydraulic excavator 1 shown in FIG. 1 will be illustrated as a construction machine according to the present invention. FIG. 1 is a perspective view showing a part of the hydraulic excavator 1 according to the present embodiment.
　図１に示されるように、油圧ショベル１は、図示しない下部走行体と、下部走行体上に旋回可能に搭載される上部旋回体３と、上部旋回体３に装着されるブーム５（作業アタッチメントを構成する一部品）とを備える。 As shown in FIG. 1, the hydraulic excavator 1 includes a lower traveling body (not shown), an upper rotating body 3 that is rotatably mounted on the lower traveling body, and a boom 5 (work attachment) mounted on the upper rotating body 3. It is equipped with one component).
　図２は、本実施形態に係る油圧ショベル１の上部旋回体３のアッパーフレーム３１を示す斜視図である。図３は、本実施形態に係る油圧ショベル１のアッパーフレーム３１を機械左側から見た側面図である。図４は、本実施形態に係る油圧ショベル１のアッパーフレーム３１を機械右側から見た側面図である。図２に示されるように、上部旋回体３は、キャビン（運転室）等の各種設備や機器類を搭載可能なアッパーフレーム３１を備えている。アッパーフレーム３１は、その車幅方向（左右方向）の中央部に位置するセンターセクション４を備えている。前記ブーム５は、アッパーフレーム３１に起伏可能に支持される。 FIG. 2 is a perspective view showing an upper frame 31 of the upper swing body 3 of the hydraulic excavator 1 according to the present embodiment. FIG. 3 is a side view of the upper frame 31 of the hydraulic excavator 1 according to the present embodiment as viewed from the left side of the machine. FIG. 4 is a side view of the upper frame 31 of the hydraulic excavator 1 according to the present embodiment as viewed from the right side of the machine. As shown in FIG. 2, the upper swing body 3 includes an upper frame 31 on which various facilities and devices such as a cabin (driver's cab) can be mounted. The upper frame 31 includes a center section 4 located at the center in the vehicle width direction (left-right direction). The boom 5 is undulatingly supported by the upper frame 31.
　センターセクション４は、底板４１と、底板４１に立設する左右一対の縦板４３Ｌ，４３Ｒと、その内側に配置される左右一対の内側縦板４３ＬＳ，４３ＲＳ（図２）と、縦板４３Ｌ，４３Ｒの上端縁部にそれぞれ設けられる背板４５Ｌ，４５Ｒとを備えて構成される。左右一対の縦板４３Ｌ，４３Ｒの前端部および左右一対の内側縦板４３ＬＳ，４３ＲＳの前端部には、左右方向に沿って開口された連結用ピン孔４３ＬＱ，４３ＲＱがそれぞれ形成されている。また、左右一対の縦板４３Ｌ，４３Ｒの頂部には、連結用ピン孔４３ＬＰ，４３ＲＰがそれぞれ形成されている。これらの連結用ピン孔には、アッパーフレーム３１のセンターセクション４に、後記のアダプタ７が連結、固定されるための不図示のアダプタ用連結ピンがそれぞれ挿入される。 The center section 4 includes a bottom plate 41, a pair of left and right vertical plates 43L, 43R standing on the bottom plate 41, a pair of left and right inner vertical plates 43LS, 43RS (FIG. 2) arranged inside the bottom plate 41, and a vertical plate 43L, It is configured to include back plates 45L and 45R provided at the upper end edge of 43R, respectively. The front ends of the pair of left and right vertical plates 43L and 43R and the front ends of the pair of left and right inner vertical plates 43LS and 43RS are formed with connecting pin holes 43LQ and 43RQ opened along the left and right directions, respectively. Further, connecting pin holes 43LP and 43RP are formed on the tops of the pair of left and right vertical plates 43L and 43R, respectively. In these connecting pin holes, adapter connecting pins (not shown) for connecting and fixing the adapter 7 described later are inserted into the center section 4 of the upper frame 31, respectively.
　図２及び図３に示されるように、センターセクション４は、左側の縦板４３Ｌのうち外側（左側）を向く面（外側面）に配置され、上面部を含むガイド部４３１Ｌを有する。ガイド部４３１Ｌの前記上面部には、上下方向を挿通方向とするガイド穴４３０Ｌが形成されている。ガイド穴４３０Ｌは、後述のガイドピン７５Ｌ（図５参照）が挿通可能な大きさを有している。 As shown in FIGS. 2 and 3, the center section 4 is arranged on the surface (outer surface) of the left vertical plate 43L facing the outside (left side), and has a guide portion 431L including an upper surface portion. A guide hole 430L having a vertical direction as an insertion direction is formed in the upper surface portion of the guide portion 431L. The guide hole 430L has a size through which a guide pin 75L (see FIG. 5), which will be described later, can be inserted.
　また、センターセクション４は、左側の背板４５Ｌの上面に配置され、上方に向かって開口された凹部を含むブラケット４５０Ｌ（位置決め部）を有する。ブラケット４５０Ｌの凹部は、後述の位置決めピン７９（図８参照）の胴部の一部に面接触可能なＲ形状を有している。このため、ブラケット４５０Ｌは、前記凹部を画定するように前後方向において互いに対向して配置された前後一対の内壁面と当該一対の内壁面同士を接続する下面部とを含む。前記Ｒ形状は当該下面部に施されている。 Further, the center section 4 is arranged on the upper surface of the back plate 45L on the left side, and has a bracket 450L (positioning portion) including a recess opened upward. The recess of the bracket 450L has an R shape that allows surface contact with a part of the body of the positioning pin 79 (see FIG. 8) described later. Therefore, the bracket 450L includes a pair of front and rear inner wall surfaces arranged to face each other in the front-rear direction so as to define the recess, and a lower surface portion connecting the pair of inner wall surfaces. The R shape is applied to the lower surface portion.
　図４に示されるように、センターセクション４は、右側の縦板４３Ｒのうち外側（右側）を向く面（外側面）に配置され、上面部を含むガイド部４３１Ｒを有する。ガイド部４３１Ｒの前記上面部には、上下方向を挿通方向とするガイド穴４３０Ｒが形成されている。ガイド穴４３０Ｒは、後述のガイドピン７５Ｒ（図７参照）が挿通可能な大きさを有している。 As shown in FIG. 4, the center section 4 is arranged on a surface (outer surface) facing the outside (right side) of the vertical plate 43R on the right side, and has a guide portion 431R including an upper surface portion. A guide hole 430R having a vertical direction as an insertion direction is formed in the upper surface portion of the guide portion 431R. The guide hole 430R has a size through which a guide pin 75R (see FIG. 7) described later can be inserted.
　また、図２及び図４に示されるように、センターセクション４は、右側の背板４５Ｒの上面に配置され、上方に向かって開口された凹部を含むブラケット４５０Ｒ（位置決め部）を有する。ブラケット４５０Ｒの凹部は、後述の位置決めピン７９（図８参照）の胴部の一部に面接触可能なＲ形状を有している。このため、ブラケット４５０Ｒは、前記凹部を画定するように前後方向において互いに対向して配置された前後一対の内壁面と当該一対の内壁面同士を接続する下面部とを含む。前記Ｒ形状は当該下面部に施されている。 Further, as shown in FIGS. 2 and 4, the center section 4 is arranged on the upper surface of the back plate 45R on the right side, and has a bracket 450R (positioning portion) including a recess opened upward. The recess of the bracket 450R has an R shape that allows surface contact with a part of the body of the positioning pin 79 (see FIG. 8) described later. Therefore, the bracket 450R includes a pair of front and rear inner wall surfaces arranged to face each other in the front-rear direction so as to define the recess, and a lower surface portion connecting the pair of inner wall surfaces. The R shape is applied to the lower surface portion.
　図５は、本実施形態に係る油圧ショベル１のブーム５およびアダプタ７が分解された状態を示す側面図である。図５に示されるように、油圧ショベル１は、ブーム５に装着され、ブーム５を起伏させるために伸縮することが可能なブームシリンダ５１を更に有する。 FIG. 5 is a side view showing a state in which the boom 5 and the adapter 7 of the hydraulic excavator 1 according to the present embodiment are disassembled. As shown in FIG. 5, the hydraulic excavator 1 further includes a boom cylinder 51 that is mounted on the boom 5 and can be expanded and contracted to raise and lower the boom 5.
　また、ブーム５の基端側には、ブーム５とブームシリンダ５１とを一体状態で分解・組立するためのアダプタ７（サブフレーム等とも称する）が取り付けられる。アダプタ７は、ブーム５およびブームシリンダ５１をセンターセクション４に回動可能に連結する。アダプタ７には、ブーム５の基端部を回動可能に連結する連結ピン（不図示）の挿通孔７１と、ブームシリンダ５１の基端部を回動可能に連結する連結ピン（不図示）の挿通孔７３とが形成されている。なお、前記センターセクション４およびアダプタ７は、本発明のブーム取付装置１００を構成する。ブーム取付装置１００は、油圧ショベル１においてブーム５をアッパーフレーム３１に取り付けるための構造である。 Further, an adapter 7 (also referred to as a subframe or the like) for disassembling and assembling the boom 5 and the boom cylinder 51 in an integrated state is attached to the base end side of the boom 5. The adapter 7 rotatably connects the boom 5 and the boom cylinder 51 to the center section 4. The adapter 7 has an insertion hole 71 for a connecting pin (not shown) that rotatably connects the base end of the boom 5, and a connecting pin (not shown) that rotatably connects the base end of the boom cylinder 51. The insertion hole 73 is formed. The center section 4 and the adapter 7 constitute the boom mounting device 100 of the present invention. The boom mounting device 100 has a structure for mounting the boom 5 to the upper frame 31 in the hydraulic excavator 1.
　図６は、本実施形態に係る油圧ショベル１のアダプタ７が装着された状態のブーム５を機械左側から見た側面図である。図６に示されるように、ブーム５の基端部及びブームシリンダ５１の基端部がアダプタ７に対して左右方向に延びる回転中心軸回りに回動可能に取り付けられ、アダプタ７によってブーム５とブームシリンダ５１とが一体状態で保持され、センターセクション４に回動可能に連結可能とされる。 FIG. 6 is a side view of the boom 5 in a state where the adapter 7 of the hydraulic excavator 1 according to the present embodiment is attached, as viewed from the left side of the machine. As shown in FIG. 6, the base end portion of the boom 5 and the base end portion of the boom cylinder 51 are rotatably attached around the rotation center axis extending in the left-right direction with respect to the adapter 7, and the adapter 7 and the boom 5 are attached. The boom cylinder 51 is held integrally and can be rotatably connected to the center section 4.
　アダプタ７は、アダプタ本体７００と、アダプタ本体７００から下方に向かってそれぞれ延びる左右一対のガイドピン７５Ｌ、７５Ｒと、を有する。アダプタ本体７００は、前記ブーム５の基端部および前記ブームシリンダ５１の基端部をそれぞれ左右方向に延びる回転中心軸周りに回動可能に支持する。アダプタ本体７００は、後方に向かって先上がりの形状を有しているとともに、左右方向に間隔をおいて配置された左側板および右側板（左右一対の側板）を有する。これらの左右側板は、上側板７０１と下側板７０２とをそれぞれ有する。上側板７０１には、ブーム５の基端部５Ａ（図５）を回動可能に支持するための前記挿通孔７１と、ブームシリンダ５１の基端部５１Ａ（図５）を回動可能に支持するための前記挿通孔７３とが、それぞれ形成されている。一方、下側板７０２には、アダプタ７をセンターセクション４に連結するための連結用ピン孔７Ａ、７Ｂがそれぞれ形成されている。これらの連結用ピン孔には、アッパーフレーム３１のセンターセクション４にアダプタ７が連結、固定されるための前述のアダプタ用連結ピンがそれぞれ挿入される。 The adapter 7 has an adapter main body 700 and a pair of left and right guide pins 75L and 75R extending downward from the adapter main body 700, respectively. The adapter body 700 rotatably supports the base end of the boom 5 and the base end of the boom cylinder 51 around a rotation center axis extending in the left-right direction. The adapter main body 700 has a shape that rises toward the rear, and has a left side plate and a right side plate (a pair of left and right side plates) that are arranged at intervals in the left-right direction. These left and right side plates have an upper plate 701 and a lower plate 702, respectively. The upper plate 701 rotatably supports the insertion hole 71 for rotatably supporting the base end portion 5A (FIG. 5) of the boom 5 and the base end portion 51A (FIG. 5) of the boom cylinder 51. The insertion holes 73 for the purpose are formed respectively. On the other hand, the lower plate 702 is formed with connecting pin holes 7A and 7B for connecting the adapter 7 to the center section 4, respectively. The above-mentioned adapter connecting pins for connecting and fixing the adapter 7 to the center section 4 of the upper frame 31 are inserted into these connecting pin holes.
　図５に示されるように、アダプタ７のアダプタ本体７００の左側板（下側板７０２）のうち外側（左側）を向く面（外側面）には、上下方向に長尺なガイドピン７５Ｌが下方に向かって延びるように設けられている。ガイドピン７５Ｌは、上述したガイド穴４３０Ｌ（図２及び図３）に挿脱可能な太さで構成されている。 As shown in FIG. 5, a guide pin 75L elongated in the vertical direction is downward on the surface (outer surface) of the left side plate (lower side plate 702) of the adapter body 700 of the adapter 7 facing the outside (left side). It is provided so as to extend toward it. The guide pin 75L has a thickness that allows it to be inserted into and removed from the guide hole 430L (FIGS. 2 and 3) described above.
　図７は、本実施形態に係る油圧ショベル１のアダプタ７が装着された状態のブーム５を機械右側から見た側面図である。図７に示されるように、アダプタ７のアダプタ本体７００の右側板（下側板７０２）のうち外側（右側）を向く面（外側面）には、上下方向に長尺なガイドピン７５Ｒが下方に向かって延びるように設けられている。ガイドピン７５Ｒは、上述したガイド穴４３０Ｒ（図４）に挿脱可能な太さで構成されている。 FIG. 7 is a side view of the boom 5 in a state where the adapter 7 of the hydraulic excavator 1 according to the present embodiment is attached, as viewed from the right side of the machine. As shown in FIG. 7, a guide pin 75R elongated in the vertical direction is downward on the surface (outer surface) of the right side plate (lower side plate 702) of the adapter body 700 of the adapter 7 facing the outside (right side). It is provided so as to extend toward it. The guide pin 75R has a thickness that allows it to be inserted and removed from the guide hole 430R (FIG. 4) described above.
　図８は、本実施形態に係る油圧ショベル１のアダプタ７がアッパーフレーム３１に取り付けられる様子を示す平面図である。図５～図８に示されるように、アダプタ７のアダプタ本体７００は、その後端側一部が機械後方に張り出した左右一対の後方張出部７７Ｌ，７７Ｒと、位置決めピン７９と、を有している。後方張出部７７Ｌ，７７Ｒには、当該後方張出部７７Ｌ，７７Ｒを左右方向に沿って貫通するピン孔７８Ｌ，７８Ｒ（位置決めピン孔）がそれぞれ形成（開口）されている。ピン孔７８Ｌ，７８Ｒには、図８に示される位置決めピン７９が挿入されて固定される。なお、左右一対の後方張出部７７Ｌ，７７Ｒは、それぞれ左右方向の外側を向く外側面（張出部外側面）を有する。 FIG. 8 is a plan view showing how the adapter 7 of the hydraulic excavator 1 according to the present embodiment is attached to the upper frame 31. As shown in FIGS. 5 to 8, the adapter body 700 of the adapter 7 has a pair of left and right rear overhanging portions 77L, 77R and a positioning pin 79, whose rear end side partially projects to the rear of the machine. ing. Pin holes 78L and 78R (positioning pin holes) that penetrate the rear overhanging portions 77L and 77R along the left-right direction are formed (opened) in the rear overhanging portions 77L and 77R, respectively. The positioning pin 79 shown in FIG. 8 is inserted into and fixed to the pin holes 78L and 78R. The pair of left and right rear overhangs 77L and 77R each have an outer surface (outer surface of the overhang) facing outward in the left-right direction.
　図８に示されるように、位置決めピン７９は、左右一対の後方張出部７７Ｌ，７７Ｒの左右方向における間隔よりも大きな寸法を有し、その左右両端部がピン孔７８Ｌ，７８Ｒ（左右一対の後方張出部７７Ｌ，７７Ｒの外側面）から左右外側にそれぞれ突出するようにピン孔７８Ｌ，７８Ｒに挿通された状態で左右一対の後方張出部７７Ｌ，７７Ｒに取り付けられている（固定されている）。後に詳述するように、アダプタ７をアッパーフレーム３１に装着する際、位置決めピン７９の胴部のうちピン孔７８Ｌ，７８Ｒから左右外側に突出した部分（位置決めピン７９の両端部）が、係合ピンとしてブラケット４５０Ｌ，４５０Ｒの凹部にそれぞれ嵌合する。 As shown in FIG. 8, the positioning pin 79 has a dimension larger than the distance between the pair of left and right rear overhangs 77L, 77R in the left-right direction, and the left and right ends thereof are pin holes 78L, 78R (a pair of left and right). It is attached (fixed) to a pair of left and right rear overhangs 77L, 77R while being inserted into pin holes 78L, 78R so as to project from the rear overhangs 77L, 77R to the left and right, respectively. There is). As will be described in detail later, when the adapter 7 is attached to the upper frame 31, the portions of the body of the positioning pin 79 that protrude to the left and right from the pin holes 78L and 78R (both ends of the positioning pin 79) are engaged. As a pin, it is fitted into the recesses of the brackets 450L and 450R, respectively.
　ブーム５（アダプタ７）をアッパーフレーム３１に装着する場合、まずは、左右のガイドピン７５Ｌ，７５Ｒが左右のガイド穴４３０Ｌ，４３０Ｒに挿通するように図示しないクレーン等を用いてブーム５を徐々に下げていく。 When mounting the boom 5 (adapter 7) on the upper frame 31, first, the boom 5 is gradually lowered using a crane or the like (not shown) so that the left and right guide pins 75L and 75R are inserted into the left and right guide holes 430L and 430R. To go.
　図９は、図８を矢印ＩＸに沿って見た側面図である。図１０は、図８を矢印Ｘに沿って見た側面図である。本実施形態では、左右のガイド穴４３０Ｌ，４３０Ｒは略同じ高さに配置されているものの、左側のガイドピン７５Ｌが右側のガイドピン７５Ｒよりも長くなるように（下方に突出するように）構成されている。このため、ブーム５を徐々に下げていくと、図９及び図１０に示されるように、先に左側のガイドピン７５Ｌが左側のガイド穴４３０Ｌに挿通され、更にブーム５を下げていくと、反対側（右側）のガイドピン７５Ｒが右側のガイド穴４３０Ｒに挿通される。 FIG. 9 is a side view of FIG. 8 as viewed along the arrow IX. FIG. 10 is a side view of FIG. 8 as viewed along the arrow X. In the present embodiment, the left and right guide holes 430L and 430R are arranged at substantially the same height, but the left guide pin 75L is configured to be longer than the right guide pin 75R (so that it protrudes downward). Has been done. Therefore, when the boom 5 is gradually lowered, as shown in FIGS. 9 and 10, the left guide pin 75L is first inserted into the left guide hole 430L, and when the boom 5 is further lowered, the boom 5 is further lowered. The guide pin 75R on the opposite side (right side) is inserted into the guide hole 430R on the right side.
　左右のガイドピン７５Ｌ，７５Ｒが左右のガイド穴４３０Ｌ，４３０Ｒにそれぞれ挿通されると、ブーム５（アダプタ７）のおよその位置が決まる。より詳しくは、アッパーフレーム３１のセンターセクション４に形成された連結用ピン孔４３ＬＱ，４３ＲＱとアダプタ７に形成された左右一対の連結用ピン孔７Ａとの前後方向および左右方向の相対位置が合致し、センターセクション４に形成された連結用ピン孔４３ＬＰ，４３ＲＰとアダプタ７に形成された左右一対の連結用ピン孔７Ｂとの前後方向および左右方向の相対位置が合致するように、センターセクション４に対するアダプタ７の相対位置が決定される（拘束される）。その後、ブーム５を更に下げていくと、最終的には、上述した位置決めピン７９（図８参照）が左右のブラケット４５０Ｌ，４５０Ｒの凹部に嵌合する。詳細には、位置決めピン７９の胴部のうちピン孔７８Ｌ，７８Ｒから左右外側に突出した部分（両端部、係合ピン）がブラケット４５０Ｌ，４５０Ｒの凹部にそれぞれ面接触して嵌合する。これにより、左右一対のブラケット４５０Ｌ，４５０Ｒ（位置決め部）が、アダプタ７の位置決めピン７９の両端部をそれぞれ上方から前記凹部に受け入れることで、アダプタ７が少なくとも下方向に移動することを阻止し、ブーム５の最終的な位置が決まる。より詳しくは、アッパーフレーム３１のセンターセクション４に形成された連結用ピン孔４３ＬＱ，４３ＲＱとアダプタ７に形成された左右一対の連結用ピン孔７Ａとの前後方向、左右方向および上下方向の相対位置が合致し、センターセクション４に形成された連結用ピン孔４３ＬＰ，４３ＲＰとアダプタ７に形成された左右一対の連結用ピン孔７Ｂとの前後方向、左右方向および上下方向の相対位置が合致するように、センターセクション４に対するアダプタ７の相対位置が決定される（拘束される）。そして、連結用ピン孔４３ＬＱ，４３ＲＱと左右一対の連結用ピン孔７Ａとに不図示のアダプタ連結ピンがそれぞれ挿入され、連結用ピン孔４３ＬＰ，４３ＲＰと左右一対の連結用ピン孔７Ｂとに不図示のアダプタ連結ピンがそれぞれ挿入されると、アダプタ７がアッパーフレーム３１に固定される。この結果、ブーム５がアッパーフレーム３１に回動可能に支持される。 When the left and right guide pins 75L and 75R are inserted into the left and right guide holes 430L and 430R, respectively, the approximate position of the boom 5 (adapter 7) is determined. More specifically, the relative positions of the connecting pin holes 43LQ and 43RQ formed in the center section 4 of the upper frame 31 and the pair of left and right connecting pin holes 7A formed in the adapter 7 in the front-rear direction and the left-right direction match. , With respect to the center section 4 so that the relative positions of the connecting pin holes 43LP and 43RP formed in the center section 4 and the pair of left and right connecting pin holes 7B formed in the adapter 7 in the front-rear direction and the left-right direction match. The relative position of the adapter 7 is determined (constrained). After that, when the boom 5 is further lowered, the positioning pin 79 (see FIG. 8) described above is finally fitted into the recesses of the left and right brackets 450L and 450R. Specifically, of the body portion of the positioning pin 79, the portions (both ends, engaging pins) protruding to the left and right outward from the pin holes 78L and 78R are brought into surface contact with the recesses of the brackets 450L and 450R, respectively. As a result, the pair of left and right brackets 450L and 450R (positioning portions) receive both ends of the positioning pins 79 of the adapter 7 into the recesses from above, thereby preventing the adapter 7 from moving at least downward. The final position of the boom 5 is determined. More specifically, the relative positions of the connecting pin holes 43LQ and 43RQ formed in the center section 4 of the upper frame 31 and the pair of left and right connecting pin holes 7A formed in the adapter 7 in the front-rear direction, the left-right direction, and the up-down direction. Are matched, and the relative positions of the connecting pin holes 43LP and 43RP formed in the center section 4 and the pair of left and right connecting pin holes 7B formed in the adapter 7 are matched in the front-rear direction, the left-right direction, and the up-down direction. In addition, the relative position of the adapter 7 with respect to the center section 4 is determined (constrained). Then, adapter connecting pins (not shown) are inserted into the connecting pin holes 43LQ and 43RQ and the pair of left and right connecting pin holes 7A, respectively, and the connecting pin holes 43LP and 43RP and the pair of left and right connecting pin holes 7B are not inserted. When each of the illustrated adapter connecting pins is inserted, the adapter 7 is fixed to the upper frame 31. As a result, the boom 5 is rotatably supported by the upper frame 31.
　また、ブーム５をアッパーフレーム３１から取り外す場合、図示しないクレーン等を用いてブーム５を徐々に持ち上げていく。ブーム５を徐々に持ち上げていくと、ブーム５に装着されたアダプタ７がアッパーフレーム３１から離れる時点がある。なお、アダプタ７がアッパーフレーム３１から離れる時点とは、アダプタ７のアダプタ本体７００の左右側板と、センターセクション４を構成する左右の縦板４３Ｌ，４３Ｒとが機械幅方向（左右方向）において重ならなくなった時点をいう。 When removing the boom 5 from the upper frame 31, the boom 5 is gradually lifted using a crane or the like (not shown). When the boom 5 is gradually lifted, there is a time point when the adapter 7 attached to the boom 5 is separated from the upper frame 31. The time when the adapter 7 separates from the upper frame 31 is when the left and right side plates of the adapter body 700 of the adapter 7 and the left and right vertical plates 43L and 43R constituting the center section 4 overlap in the machine width direction (left and right direction). It means the time when it disappears.
　図１１は、本実施形態に係る油圧ショベル１のアダプタ７がアッパーフレーム３１から離れた時点の状態を機械左側から見た側面図である。図１２は、本実施形態に係る油圧ショベル１のアダプタ７がアッパーフレーム３１に取り付けられた状態を機械左側から見た側面図である。本実施形態では、図１１に示されるように、アダプタ７がアッパーフレーム３１から離れた時点において、左側のガイドピン７５Ｌは、左側のガイド穴４３０Ｌに挿通された状態を維持している。なお、図示は省略するが、反対側（右側）のガイドピン７５Ｒも右側のガイド穴４３０Ｒに挿通された状態を維持している。すなわち、アダプタ７がアッパーフレーム３１から離れた時点において、左右のガイドピン７５Ｌ，７５Ｒは左右のガイド穴４３０Ｌ，４３０Ｒに挿通された状態を維持する長さで構成されている。なお、アダプタ７がアッパーフレーム３１から脱離される場合に、左右方向から見てアダプタ本体７００の下端部がセンターセクション４の左右一対の縦板４３Ｌ，４３Ｒの上端部に合致したときに、前記左右一対のガイドピン７５Ｌ，７５Ｒのうちの少なくとも一方のガイドピンが、左右一対の縦板４３Ｌ，４３Ｒのガイド穴４３０Ｌ，４３０Ｒのうちの少なくとも一方のガイド穴に挿入されているように、左右一対のガイドピン７５Ｌ，７５Ｒの長さが設定されていてもよい。 FIG. 11 is a side view of the state when the adapter 7 of the hydraulic excavator 1 according to the present embodiment is separated from the upper frame 31 as viewed from the left side of the machine. FIG. 12 is a side view of the state in which the adapter 7 of the hydraulic excavator 1 according to the present embodiment is attached to the upper frame 31 as viewed from the left side of the machine. In the present embodiment, as shown in FIG. 11, when the adapter 7 is separated from the upper frame 31, the left guide pin 75L is maintained in a state of being inserted into the left guide hole 430L. Although not shown, the guide pin 75R on the opposite side (right side) is also maintained in a state of being inserted into the guide hole 430R on the right side. That is, when the adapter 7 is separated from the upper frame 31, the left and right guide pins 75L and 75R are configured to have a length that maintains the state of being inserted into the left and right guide holes 430L and 430R. When the adapter 7 is detached from the upper frame 31, when the lower end portion of the adapter body 700 is aligned with the upper end portions of the pair of left and right vertical plates 43L and 43R of the center section 4 when viewed from the left and right direction, the left and right portions are described. A pair of left and right guide pins so that at least one of the pair of guide pins 75L and 75R is inserted into at least one of the guide holes 430L and 430R of the pair of left and right vertical plates 43L and 43R. The lengths of the guide pins 75L and 75R may be set.
　また、図１２に示されるように、左側のガイド部４３１Ｌは、側面視（左側方から見た場合）において油圧ショベル１の機械外側（左側）から視認可能な位置に配置される。詳細には、左側のガイド部４３１Ｌは、前後方向に関して、図示しないキャビンが設置されるチルトデッキ８１と作動油タンク８３との間に配置される。この際、作業者がガイド部４３１Ｌを左側方から視認できれば、ガイドピン７５Ｌの挿入状態を充分確認可能であるが、作業者の目線から見て、ガイド部４３１Ｌに形成されたガイド穴４３０Ｌが更に視認可能であれば、ガイドピン７５Ｌの挿入作業を更に容易かつ確実に行うことができる。なお、右側のガイド部４３１Ｒについても同様である。 Further, as shown in FIG. 12, the guide portion 431L on the left side is arranged at a position visible from the outside (left side) of the machine of the hydraulic excavator 1 in a side view (when viewed from the left side). Specifically, the left guide portion 431L is arranged in the front-rear direction between the tilt deck 81 in which a cabin (not shown) is installed and the hydraulic oil tank 83. At this time, if the operator can visually recognize the guide portion 431L from the left side, the inserted state of the guide pin 75L can be sufficiently confirmed, but from the operator's point of view, the guide hole 430L formed in the guide portion 431L is further increased. If it is visible, the insertion work of the guide pin 75L can be performed more easily and reliably. The same applies to the guide portion 431R on the right side.
　また、本実施形態では、図２に示すように、ガイド部４３１Ｌの左右方向の反対側には、アッパーフレーム３１上の構造物８５が配置されている。このため、ガイド部４３１Ｒは前記構造物８５よりも前方に配置されており、上記と同様に、油圧ショベル１の右側方からガイド部４３１Ｒが視認可能である。なお、ガイド部４３１Ｌは、連結用ピン孔４３ＬＰの後方に配置され（図３）、ガイド部４３１Ｒは連結用ピン孔４３ＲＰの前方に配置されている（図４）。なお、連結用ピン孔４３ＬＰ、４３ＲＰは同じ軸線上に配置されている。 Further, in the present embodiment, as shown in FIG. 2, the structure 85 on the upper frame 31 is arranged on the opposite side of the guide portion 431L in the left-right direction. Therefore, the guide portion 431R is arranged in front of the structure 85, and the guide portion 431R can be visually recognized from the right side of the hydraulic excavator 1 in the same manner as described above. The guide portion 431L is arranged behind the connecting pin hole 43LP (FIG. 3), and the guide portion 431R is arranged in front of the connecting pin hole 43RP (FIG. 4). The connecting pin holes 43LP and 43RP are arranged on the same axis.
　以上、本実施形態では、縦板４３Ｌのうち外側（左側）を向く面に配置されたガイド部４３１Ｌにガイド穴４３０Ｌ（図２及び図３参照）が形成され、縦板４３Ｒのうち外側（右側）を向く面に配置されたガイド部４３１Ｒにガイド穴４３０Ｒ（図４参照）が形成されている。また、アダプタ７のアダプタ本体７００の左側板のうち外側（左側）を向く面にガイドピン７５Ｌ（図５参照）が下方に延びるように設けられ、アダプタ７のアダプタ本体７００の右側板のうち外側（右側）を向く面にガイドピン７５Ｒ（図７参照）が下方に延びるように設けられている。このため、アダプタ７をセンターセクション４に取り付ける際に、左右のガイドピン７５Ｌ，７５Ｒと左右のガイド穴４３０Ｌ，４３０Ｒとの挿通状況を機械側方からそれぞれ視認することができる。したがって、センターセクション４に対してブーム５（アダプタ７）を取り付ける際に両者を容易に位置合わせすることが可能である。なお、左右のガイドピン７５Ｌ、７５Ｒは、アダプタ７のアダプタ本体７００の下面部などから突出するものでもよい。 As described above, in the present embodiment, the guide hole 430L (see FIGS. 2 and 3) is formed in the guide portion 431L arranged on the surface facing the outside (left side) of the vertical plate 43L, and the outside (right side) of the vertical plate 43R. A guide hole 430R (see FIG. 4) is formed in the guide portion 431R arranged on the surface facing the). Further, a guide pin 75L (see FIG. 5) is provided so as to extend downward on the surface of the left side plate of the adapter body 700 of the adapter 7 facing the outside (left side), and the outside of the right side plate of the adapter body 700 of the adapter 7 is provided. A guide pin 75R (see FIG. 7) is provided so as to extend downward on the surface facing (right side). Therefore, when the adapter 7 is attached to the center section 4, the insertion status of the left and right guide pins 75L and 75R and the left and right guide holes 430L and 430R can be visually recognized from the side of the machine. Therefore, when the boom 5 (adapter 7) is attached to the center section 4, both can be easily aligned. The left and right guide pins 75L and 75R may protrude from the lower surface of the adapter body 700 of the adapter 7.
　また、本実施形態では、左右のガイドピン７５Ｌ，７５Ｒが左右のガイド穴４３０Ｌ，４３０Ｒにそれぞれ挿通されると、ブーム５のおよその位置（前後方向および左右方向の位置）が決まる。そして、位置決めピン７９の胴部のうちピン孔７８Ｌ，７８Ｒから左右外側に突出した部分（係合ピン）がブラケット４５０Ｌ，４５０Ｒの凹部にそれぞれ上方から嵌合すると、ブーム５の最終的な位置（前後方向、左右方向および上下方向の位置）が決まる。すなわち、本実施形態では、ブーム５が２段階で順に位置決めされる構成となっている。よって、ブームが１段階で位置決めされる構成のものに比べ、より簡易にブーム５を位置合わせすることが可能である。 Further, in the present embodiment, when the left and right guide pins 75L and 75R are inserted into the left and right guide holes 430L and 430R, respectively, the approximate positions (positions in the front-rear direction and the left-right direction) of the boom 5 are determined. Then, when the portions (engagement pins) protruding from the pin holes 78L and 78R to the left and right outside of the body of the positioning pin 79 are fitted into the recesses of the brackets 450L and 450R from above, the final position of the boom 5 ( Positions in the front-back direction, left-right direction, and up-down direction) are determined. That is, in the present embodiment, the boom 5 is positioned in order in two stages. Therefore, it is possible to align the boom 5 more easily than the one in which the boom is positioned in one step.
　また、本実施形態では、左右のガイド穴４３０Ｌ，４３０Ｒは略同じ高さに配置される一方、左側のガイドピン７５Ｌが右側のガイドピン７５Ｒよりも長くなるように構成され、より下方に延びている。このため、ブーム５を徐々に下げていくと、図９及び図１０に示されるように、先にガイドピン７５Ｌがガイド穴４３０Ｌに挿通され、更にブーム５を下げていくと、反対側のガイドピン７５Ｒがガイド穴４３０Ｒに挿通されるように、左右一対のガイドピン７５Ｒ，７５Ｌおよび左右一対のガイド部のガイド穴４３０Ｒ，４３０Ｌの互いの相対位置が設定されている。したがって、ガイドピン７５Ｌ，７５Ｒがガイド穴４３０Ｌ，４３０Ｒに同時に挿通されるものに比べて、挿通作業が容易になり、作業性が高い。 Further, in the present embodiment, the left and right guide holes 430L and 430R are arranged at substantially the same height, while the left guide pin 75L is configured to be longer than the right guide pin 75R and extends further downward. There is. Therefore, when the boom 5 is gradually lowered, the guide pin 75L is first inserted into the guide hole 430L as shown in FIGS. 9 and 10, and when the boom 5 is further lowered, the guide on the opposite side is inserted. The relative positions of the pair of left and right guide pins 75R and 75L and the pair of left and right guide holes 430R and 430L are set so that the pin 75R is inserted into the guide hole 430R. Therefore, the insertion work is easier and the workability is higher than that in which the guide pins 75L and 75R are inserted into the guide holes 430L and 430R at the same time.
　また、本実施形態では、アダプタ７のアダプタ本体７００がアッパーフレーム３１から離れた時点において、左右のガイドピン７５Ｌ，７５Ｒは、左右のガイド穴４３０Ｌ，４３０Ｒにそれぞれ挿通された状態を維持している。すなわち、左右のガイドピン７５Ｌ，７５Ｒが、左右の前記ガイド穴４３０Ｌ，４３０Ｒに挿入された状態で、左右方向から見てアダプタ７のアダプタ本体７００がセンターセクション４の左右一対の縦板４３Ｌ，４３Ｒから上方に離間するように、左右一対のガイドピン７５Ｌ，７５Ｒの長さが設定されている。このため、アダプタ７がアッパーフレーム３１から離れたことに起因するアダプタ７の荷振れを抑制し、周辺に配置されたタンクやガードにアダプタ７が接触するのを防止することが可能である。なお、上記において、アダプタ７がアッパーフレーム３１から離れた時点において、左右のガイドピン７５Ｌ，７５Ｒのうちの一方のガイドピンが、左右のガイド穴４３０Ｌ，４３０Ｒのうち対応するガイド穴に挿通された状態が維持されてもよい。 Further, in the present embodiment, when the adapter body 700 of the adapter 7 is separated from the upper frame 31, the left and right guide pins 75L and 75R are maintained in a state of being inserted into the left and right guide holes 430L and 430R, respectively. .. That is, with the left and right guide pins 75L and 75R inserted into the left and right guide holes 430L and 430R, the adapter body 700 of the adapter 7 is a pair of left and right vertical plates 43L and 43R of the center section 4 when viewed from the left and right. The lengths of the pair of left and right guide pins 75L and 75R are set so as to be separated upward from the above. Therefore, it is possible to suppress the load swing of the adapter 7 due to the adapter 7 being separated from the upper frame 31, and prevent the adapter 7 from coming into contact with the tanks and guards arranged in the vicinity. In the above, when the adapter 7 is separated from the upper frame 31, one of the left and right guide pins 75L and 75R is inserted into the corresponding guide hole among the left and right guide holes 430L and 430R. The state may be maintained.
　また、本実施形態によれば、左側のガイド部４３１Ｌは、前後方向に関して、図示しないキャビンが設置されるチルトデッキ８１と作動油タンク８３との間に配置される。このため、作業者は、少なくとも左側のガイドピン７５Ｌに関しては左側のガイド部４３１Ｌのガイド穴４３０Ｌへの挿通状況を機械側方から確実に視認することが可能である。 Further, according to the present embodiment, the guide portion 431L on the left side is arranged between the tilt deck 81 in which the cabin (not shown) is installed and the hydraulic oil tank 83 in the front-rear direction. Therefore, the operator can reliably visually recognize the insertion status of the left guide portion 431L into the guide hole 430L with respect to at least the left guide pin 75L from the side of the machine.
　本発明による建設機械のブーム取付装置は上述した実施形態に限定されず、以下に例示されるように種々の変形や改良が可能である。 The boom mounting device for construction machinery according to the present invention is not limited to the above-described embodiment, and various modifications and improvements are possible as illustrated below.
　例えば、上記実施形態では、左右のブラケット４５０Ｌ，４５０Ｒが左右の背板４５Ｌ，４５Ｒに設けられる場合を例示したが、これに限定されず、左右のブラケット４５０Ｌ，４５０Ｒが左右の縦板４３Ｌ，４３Ｒの上端縁部に直接設けられる態様でもよい。 For example, in the above embodiment, the case where the left and right brackets 450L and 450R are provided on the left and right back plates 45L and 45R is illustrated, but the present invention is not limited to this, and the left and right brackets 450L and 450R are left and right vertical plates 43L and 43R. It may be provided directly on the upper end edge of the.
　また、上記実施形態では、左右のガイド穴４３０Ｌ，４３０Ｒは略同じ高さに配置され、左側のガイドピン７５Ｌが右側のガイドピン７５Ｒよりも長く、より下方に突出するように構成される場合を例示したが、本発明はこれに限定されるものではない。 Further, in the above embodiment, the left and right guide holes 430L and 430R are arranged at substantially the same height, and the left guide pin 75L is longer than the right guide pin 75R and is configured to protrude further downward. Although exemplified, the present invention is not limited thereto.
　例えば、左右のガイドピン７５Ｌ，７５Ｒを略同じ長さに構成し、左側のガイド穴４３０Ｌが右側のガイド穴４３０Ｒよりも高い位置に配置されるように構成されてもよい。かかる変形実施形態においても、先にガイドピン７５Ｌがガイド穴４３０Ｌに挿通され、その後、反対側のガイドピン７５Ｒがガイド穴４３０Ｒに挿通されることが可能である。 For example, the left and right guide pins 75L and 75R may be configured to have substantially the same length, and the left guide hole 430L may be arranged at a position higher than the right guide hole 430R. Also in such a modified embodiment, the guide pin 75L can be inserted into the guide hole 430L first, and then the guide pin 75R on the opposite side can be inserted into the guide hole 430R.
　また、上記実施形態では、アダプタ７がアッパーフレーム３１から離れた時点において、左右のガイドピン７５Ｌ，７５Ｒが左右のガイド穴４３０Ｌ，４３０Ｒにそれぞれ挿通された状態を維持している場合を例示したが、本発明はこれに限定されるものではない。 Further, in the above embodiment, the case where the left and right guide pins 75L and 75R are maintained in the left and right guide holes 430L and 430R, respectively, is maintained when the adapter 7 is separated from the upper frame 31. , The present invention is not limited to this.
　例えば、アダプタ７がアッパーフレーム３１から離れた時点において、左右のガイドピン７５Ｌ，７５Ｒのうち一方が左右のガイド穴４３０Ｌ，４３０Ｒの一方に挿通された状態を維持するようにしてもよい。すなわち、アダプタ７がアッパーフレーム３１から離れた時点において、左右のガイドピン７５Ｌ，７５Ｒのうち一方が左右のガイド穴４３０Ｌ，４３０Ｒの一方に挿通された状態を維持する長さを有するように構成してもよい。 For example, when the adapter 7 is separated from the upper frame 31, one of the left and right guide pins 75L and 75R may be maintained in a state of being inserted into one of the left and right guide holes 430L and 430R. That is, when the adapter 7 is separated from the upper frame 31, one of the left and right guide pins 75L and 75R is configured to have a length that maintains the state of being inserted into one of the left and right guide holes 430L and 430R. You may.
　以上のように本発明にかかる建設機械のブーム取付装置は、油圧ショベル等においてブームをアッパーフレームに装着するのに適している。 As described above, the boom mounting device for construction machinery according to the present invention is suitable for mounting the boom on the upper frame in a hydraulic excavator or the like.
　本発明によって提供されるのは、アッパーフレームと前記アッパーフレームに起伏可能に支持されるブームと前記ブームを起伏させるように伸縮するブーム起伏シリンダとを含む建設機械において前記ブームを前記アッパーフレームに取り付けるためのブーム取付装置である。当該ブーム取付装置は、前記アッパーフレームに備えられ、底板と前記底板に立設される左右一対の縦板とを含むセンターセクションと、前記ブームと前記ブームシリンダとをそれぞれ前記センターセクションに回動可能に連結するアダプタと、を備え、前記アダプタは、前記ブームの基端部および前記ブームシリンダの基端部をそれぞれ左右方向に延びる回転中心軸周りに回動可能に支持するアダプタ本体と、前記アダプタ本体から下方に向かってそれぞれ延びる左右一対のガイドピンと、を有し、前記左右一対の縦板は、左右方向の外側を向く外側面と、前記外側面に配置され上面部を含むガイド部であって、当該ガイド部の前記上面部には前記ブームが前記アッパーフレームに装着される際に下方向に沿って前記ガイドピンを受け入れることが可能なガイド穴が開口されているガイド部と、をそれぞれ有する。 Provided by the present invention is to attach the boom to the upper frame in a construction machine including an upper frame, a boom undulatingly supported by the upper frame, and a boom undulating cylinder that expands and contracts to undulate the boom. It is a boom mounting device for. The boom mounting device is provided on the upper frame, and has a center section including a bottom plate and a pair of left and right vertical plates erected on the bottom plate, and the boom and the boom cylinder can be rotated to the center section, respectively. The adapter includes an adapter body that rotatably supports the base end portion of the boom and the base end portion of the boom cylinder around a rotation center axis extending in the left-right direction, and the adapter. It has a pair of left and right guide pins extending downward from the main body, and the pair of left and right vertical plates are an outer surface facing outward in the left-right direction and a guide portion arranged on the outer surface and including an upper surface portion. Each of the upper surface portion of the guide portion has a guide portion having a guide hole that can receive the guide pin along the downward direction when the boom is mounted on the upper frame. Have.
　このような構成によれば、センターセクションを構成する左右一対の縦板のうち外側を向く面にガイド部がそれぞれ配置され、アダプタに左右一対のガイドピンが設けられているため、アダプタをセンターセクションに取り付ける際に、作業者は左右のガイドピンと左右のガイド部のガイド穴との挿通状況を機械側方から視認することができる。また、左右のガイドピンが左右のガイド穴に挿通されると、ブームを支持するアダプタをセンターセクションに対して前後方向および左右方向において位置決めすることができる。したがって、建設機械のアッパーフレームに対してブームを取り付ける際に両者を水平方向において容易に位置合わせすることが可能となる。 According to such a configuration, the guide portions are arranged on the outward facing surfaces of the pair of left and right vertical plates constituting the center section, and the adapter is provided with the pair of left and right guide pins, so that the adapter can be centered. The operator can visually check the insertion status between the left and right guide pins and the guide holes of the left and right guide portions from the side of the machine. Further, when the left and right guide pins are inserted into the left and right guide holes, the adapter supporting the boom can be positioned in the front-rear direction and the left-right direction with respect to the center section. Therefore, when the boom is attached to the upper frame of the construction machine, both can be easily aligned in the horizontal direction.
　上記の構成において、前記アダプタの前記アダプタ本体は、機械後方に張り出した左右一対の後方張出部であって、それぞれ左右方向の外側を向く張出部外側面を有する左右一対の後方張出部と、前記左右一対の後方張出部の前記張出部外側面から左右方向の外側に向かって延びる左右一対の係合ピンと、を有し、前記センターセクションは、上方に向かって開口された凹部を画定するように前後方向において互いに対向して配置された前後一対の内壁面と当該一対の内壁面同士を接続する下面部とをそれぞれ含む左右一対の位置決め部であって、前記ブームが前記アッパーフレームに装着される際に前記アダプタ本体の前記左右一対の係合ピンをそれぞれ上方から前記凹部に受け入れることで前記アダプタが少なくとも下方向に移動することを阻止する、左右一対の位置決め部を有することが望ましい。 In the above configuration, the adapter body of the adapter is a pair of left and right rear overhangs protruding rearward of the machine, and each pair of left and right rear overhangs having outer surfaces of the overhangs facing outward in the left-right direction. And a pair of left and right engaging pins extending outward in the left-right direction from the outer surface of the overhanging portion of the pair of left and right rear overhanging portions, and the center section is a recess opened upward. A pair of left and right positioning portions including a pair of front and rear inner wall surfaces arranged so as to demarcate the front and rear surfaces and a lower surface portion connecting the pair of inner wall surfaces, and the boom is the upper. Having a pair of left and right positioning portions that prevent the adapter from moving at least downward by receiving the pair of left and right engaging pins of the adapter body into the recess from above when mounted on the frame. Is desirable.
　本構成によれば、左右の係合ピンが左右の位置決め部の凹部にそれぞれ嵌まり込むと、ブームを支持するアダプタをセンターセクションに対して下方向において位置決めすることができる。この際、左右の係合ピンは左右の後方張出部の外側面から外側に突出しているため、係合ピンが作業者によって視認されやすい。したがって、建設機械のアッパーフレームに対してブームを取り付ける際に両者を上下方向においても容易に位置合わせすることが可能となる。 According to this configuration, when the left and right engaging pins are fitted into the recesses of the left and right positioning portions, the adapter supporting the boom can be positioned downward with respect to the center section. At this time, since the left and right engaging pins project outward from the outer surface of the left and right rear overhanging portions, the engaging pins are easily visible to the operator. Therefore, when the boom is attached to the upper frame of the construction machine, both can be easily aligned in the vertical direction.
　上記の構成において、前記左右一対の後方張出部には、当該後方張出部を左右方向に沿って貫通する位置決めピン孔がそれぞれ開口されており、前記アダプタ本体は、前記左右一対の後方張出部の左右方向における間隔よりも大きな寸法を有する位置決めピンを更に有し、当該位置決めピンは、その両端部が前記左右一対の後方張出部から左右方向の外側にそれぞれ突出するように前記左右一対の位置決めピン孔にそれぞれ挿通された状態で前記左右一対の後方張出部に固定されており、前記位置決めピンの前記両端部が前記左右一対の係合ピンを構成することが望ましい。 In the above configuration, the pair of left and right rear overhangs are each opened with positioning pin holes that penetrate the rear overhang along the left-right direction, and the adapter body is formed by the pair of left and right rear overhangs. Further having a positioning pin having a dimension larger than the distance between the protrusions in the left-right direction, the positioning pin has the left and right so that both ends thereof protrude outward from the pair of left and right rear overhangs in the left-right direction. It is desirable that the positioning pins are fixed to the pair of left and right rear overhangs in a state of being inserted into the pair of positioning pin holes, and that both ends of the positioning pin form the pair of left and right engaging pins.
　本構成によれば、１本の位置決めピンの両端部によって一対の係合ピンを構成することができるため、一対の係合ピンの相対位置を安定して維持することができる。また、位置決めピンが左右の後方張出部同士を接続し、アダプタ本体の剛性を高めることができる。 According to this configuration, since a pair of engaging pins can be formed by both ends of one positioning pin, the relative positions of the pair of engaging pins can be stably maintained. In addition, the positioning pin connects the left and right rear overhangs to each other, and the rigidity of the adapter body can be increased.
　上記の構成において、前記ブームが前記アッパーフレームに装着される際に、前記左右一対のガイドピンのうちの一方のガイドピンが他方のガイドピンに先立って前記左右一対の縦板の前記ガイド穴のうちの一方のガイド穴に挿入されるように、前記左右一対のガイドピンおよび前記左右一対の縦板の前記ガイド部の相対位置が設定されていることが望ましい。 In the above configuration, when the boom is mounted on the upper frame, one of the left and right guide pins is inserted into the guide holes of the left and right vertical plates prior to the other guide pin. It is desirable that the relative positions of the pair of left and right guide pins and the guide portion of the pair of left and right vertical plates are set so as to be inserted into one of the guide holes.
　本構成によれば、左右一対のガイドピンが左右一対のガイド穴に同時に挿通されるものに比べて、挿通作業が容易になり、作業性を高めることができる。 According to this configuration, the insertion work becomes easier and the workability can be improved as compared with the case where the pair of left and right guide pins are inserted into the pair of left and right guide holes at the same time.
　上記の構成において、前記アダプタが前記アッパーフレームから脱離される場合に、左右方向から見て前記アダプタ本体の下端部が前記センターセクションの前記左右一対の縦板の上端部と合致したときに、前記左右一対のガイドピンのうちの少なくとも一方のガイドピンが、前記左右一対の縦板の前記ガイド穴のうちの少なくとも一方のガイド穴に挿入されているように前記左右一対のガイドピンの長さがそれぞれ設定されていることが望ましい。 In the above configuration, when the adapter is detached from the upper frame, when the lower end portion of the adapter body is aligned with the upper end portions of the pair of left and right vertical plates of the center section when viewed from the left and right direction, the said The length of the pair of left and right guide pins is such that at least one of the pair of left and right guide pins is inserted into at least one of the guide holes of the pair of left and right vertical plates. It is desirable that each is set.
　本構成によれば、アダプタがアッパーフレームから離れる際にアダプタの荷振れを抑制し、周辺に配置されたタンクやガードにアダプタが接触することを防止することが可能となる。 According to this configuration, it is possible to suppress the load swing of the adapter when the adapter separates from the upper frame, and prevent the adapter from coming into contact with the tanks and guards arranged in the vicinity.
　上記の構成において、前記左右一対のガイド部のうちの少なくとも一方のガイド部は、側面視において前記建設機械の外側から視認可能な位置に配置されていることが望ましい。 In the above configuration, it is desirable that at least one of the pair of left and right guide portions is arranged at a position that can be visually recognized from the outside of the construction machine in a side view.
　本構成によれば、作業者は、少なくとも一方のガイドピンがガイド部のガイド穴に挿通される様子を機械側方から確実に視認することが可能となる。 According to this configuration, the operator can surely visually recognize from the side of the machine how at least one of the guide pins is inserted into the guide hole of the guide portion.

Claims (6)

  1. 　アッパーフレームと前記アッパーフレームに起伏可能に支持されるブームと前記ブームを起伏させるように伸縮するブームシリンダとを含む建設機械において前記ブームを前記アッパーフレームに取り付けるためのブーム取付装置であって、
    　前記アッパーフレームに備えられ、底板と前記底板に立設される左右一対の縦板とを含むセンターセクションと、
    　前記ブームと前記ブームシリンダとをそれぞれ前記センターセクションに回動可能に連結するアダプタと、
    を備え、
    　前記アダプタは、
    　　前記ブームの基端部および前記ブームシリンダの基端部をそれぞれ左右方向に延びる回転中心軸周りに回動可能に支持するアダプタ本体と、
    　　前記アダプタ本体から下方に向かってそれぞれ延びる左右一対のガイドピンと、
    　を有し、
    　前記左右一対の縦板は、
    　　左右方向の外側を向く外側面と、
    　　前記外側面に配置され上面部を含むガイド部であって、当該ガイド部の前記上面部には前記ブームが前記アッパーフレームに装着される際に下方向に沿って前記ガイドピンを受け入れることが可能なガイド穴が開口されているガイド部と、
    　をそれぞれ有する、建設機械のブーム取付装置。     A boom mounting device for mounting the boom on the upper frame in a construction machine including an upper frame, a boom undulatingly supported by the upper frame, and a boom cylinder that expands and contracts to undulate the boom.
    A center section provided on the upper frame and including a bottom plate and a pair of left and right vertical plates erected on the bottom plate.
    An adapter that rotatably connects the boom and the boom cylinder to the center section, respectively.
    With
    The adapter
    An adapter body that rotatably supports the base end of the boom and the base end of the boom cylinder around a rotation center axis extending in the left-right direction, respectively.
    A pair of left and right guide pins extending downward from the adapter body,
    Have,
    The pair of left and right vertical plates
    The outer surface facing outward in the left-right direction and
    A guide portion arranged on the outer surface and including an upper surface portion, and the upper surface portion of the guide portion can receive the guide pin along the downward direction when the boom is mounted on the upper frame. Guide part with various guide holes and
    A boom mounting device for construction machinery, each of which has.
  2. 　前記アダプタの前記アダプタ本体は、
    　　機械後方に張り出した左右一対の後方張出部であって、それぞれ左右方向の外側を向く張出部外側面を有する左右一対の後方張出部と、
    　　前記左右一対の後方張出部の前記張出部外側面から左右方向の外側に向かって延びる左右一対の係合ピンと、
    　を有し、
    　前記センターセクションは、上方に向かって開口された凹部を画定するように前後方向において互いに対向して配置された前後一対の内壁面と当該一対の内壁面同士を接続する下面部とをそれぞれ含む左右一対の位置決め部であって、前記ブームが前記アッパーフレームに装着される際に前記アダプタ本体の前記左右一対の係合ピンをそれぞれ上方から前記凹部に受け入れることで前記アダプタが少なくとも下方向に移動することを阻止する、左右一対の位置決め部を有する、
    請求項１に記載の建設機械のブーム取付装置。     The adapter body of the adapter
    A pair of left and right rear overhangs protruding rearward of the machine, and a pair of left and right rear overhangs each having an outer surface of the overhang facing outward in the left-right direction.
    A pair of left and right engaging pins extending from the outer surface of the pair of left and right rear overhangs toward the outside in the left-right direction,
    Have,
    The center section includes a pair of front and rear inner wall surfaces arranged to face each other in the front-rear direction so as to define a recess opened upward, and a left and right portion including a lower surface portion connecting the pair of inner wall surfaces. A pair of positioning portions, the adapter moves at least downward by receiving the pair of left and right engaging pins of the adapter body into the recesses from above when the boom is mounted on the upper frame. It has a pair of left and right positioning parts to prevent this.
    The boom mounting device for a construction machine according to claim 1.
  3. 　前記左右一対の後方張出部には、当該後方張出部を左右方向に沿って貫通する位置決めピン孔がそれぞれ開口されており、
    　前記アダプタ本体は、前記左右一対の後方張出部の左右方向における間隔よりも大きな寸法を有する位置決めピンを更に有し、当該位置決めピンは、その両端部が前記左右一対の後方張出部から左右方向の外側にそれぞれ突出するように前記左右一対の位置決めピン孔にそれぞれ挿通された状態で前記左右一対の後方張出部に固定されており、前記位置決めピンの前記両端部が前記左右一対の係合ピンを構成する、請求項２に記載の建設機械のブーム取付装置。     The pair of left and right rear overhangs are each provided with positioning pin holes that penetrate the rear overhang along the left-right direction.
    The adapter body further has a positioning pin having a dimension larger than the distance between the pair of left and right rear overhangs in the left-right direction, and both ends of the positioning pin are left and right from the pair of left and right rear overhangs. It is fixed to the pair of left and right rear overhangs in a state of being inserted into the pair of left and right positioning pin holes so as to project outward in the direction, and both ends of the positioning pin are engaged with the pair of left and right positioning pins. The boom mounting device for a construction machine according to claim 2, which constitutes a matching pin.
  4. 　前記ブームが前記アッパーフレームに装着される際に、前記左右一対のガイドピンのうちの一方のガイドピンが他方のガイドピンに先立って前記左右一対の縦板の前記ガイド穴のうちの一方のガイド穴に挿入されるように、前記左右一対のガイドピンおよび前記左右一対の縦板の前記ガイド部の相対位置が設定されている、請求項１乃至３の何れか１項に記載の建設機械のブーム取付装置。 When the boom is mounted on the upper frame, one of the left and right guide pins guides one of the guide holes of the left and right vertical plates prior to the other guide pin. The construction machine according to any one of claims 1 to 3, wherein the relative positions of the pair of left and right guide pins and the guide portions of the pair of left and right vertical plates are set so as to be inserted into the holes. Boom mounting device.
  5. 　前記アダプタが前記アッパーフレームから脱離される場合に、左右方向から見て前記アダプタ本体の下端部が前記センターセクションの前記左右一対の縦板の上端部と合致したときに、前記左右一対のガイドピンのうちの少なくとも一方のガイドピンが、前記左右一対の縦板の前記ガイド穴のうちの少なくとも一方のガイド穴に挿入されているように、前記左右一対のガイドピンの長さがそれぞれ設定されている、請求項１乃至４の何れか１項に記載の建設機械のブーム取付装置。 When the adapter is detached from the upper frame and the lower end of the adapter body is aligned with the upper ends of the pair of left and right vertical plates of the center section when viewed from the left and right, the pair of left and right guide pins The lengths of the pair of left and right guide pins are set so that at least one of the guide pins is inserted into at least one of the guide holes of the pair of left and right vertical plates. The boom mounting device for construction machinery according to any one of claims 1 to 4.
  6. 　前記左右一対のガイド部のうちの少なくとも一方のガイド部は、側面視において前記建設機械の外側から視認可能な位置に配置されている、請求項１乃至５の何れか１項に記載の建設機械のブーム取付装置。 The construction machine according to any one of claims 1 to 5, wherein at least one of the pair of left and right guide parts is arranged at a position visible from the outside of the construction machine in a side view. Boom mounting device.
PCT/JP2019/050520 2019-03-15 2019-12-24 Construction machine boom mount device WO2020188935A1 (en)

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CA3126541A CA3126541A1 (en) 2019-03-15 2019-12-24 Construction machine boom mount device
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JPH06300033A (en) * 1993-04-15 1994-10-25 Hitachi Constr Mach Co Ltd Combined turn and dropout stopping device for connecting pin for interconnecting inside member and outside member
JP2008202232A (en) * 2007-02-16 2008-09-04 Hitachi Constr Mach Co Ltd Construction machine

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JP5215089B2 (en) * 2008-09-04 2013-06-19 日立建機株式会社 Boom mounting device and mounting method
JP4911175B2 (en) * 2009-01-16 2012-04-04 コベルコ建機株式会社 Front attachment stand and front attachment connection method using the same
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JPH06300033A (en) * 1993-04-15 1994-10-25 Hitachi Constr Mach Co Ltd Combined turn and dropout stopping device for connecting pin for interconnecting inside member and outside member
JP2008202232A (en) * 2007-02-16 2008-09-04 Hitachi Constr Mach Co Ltd Construction machine
JP4713516B2 (en) 2007-02-16 2011-06-29 日立建機株式会社 Construction machinery

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See also references of EP3896229A4

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